JPS6113805B2 - - Google Patents

Description

Detailed Description of the Invention The present invention is a forced circulation bath heating device that changes the jet flow pattern into the bathtub, improves the stirring effect in the bathtub, and improves the pleasure of bathing due to the jet flow. The purpose is to prevent harm caused by heated jets.

Conventionally, the jetting device into the bathtub in a forced circulation bath heating device has a fixed spout having a fixed shape, and therefore has a single jet pattern. Therefore, if the bather becomes uncomfortable due to the jet stream, or if high-temperature water sprays out, the pump must be stopped to stop the circulation. Therefore, there was a drawback that stirring of the bath was temporarily stopped.

The present invention solves the above-mentioned drawbacks of the conventional method by arranging a single-flow ejection passage having a fixed-shaped opening and a self-oscillating fluid element in parallel, and changing the ejection flow pattern by switching between them.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 7.

In the figure, 1 is a heating device, 2 is a bathtub, and 3 is a pump for circulating bath water. A bathtub jetting device 4 is attached to the outlet side of the circulation bath in the bathtub 2, and a suction device 4' is attached to the suction side. The jetting device 4 for a bathtub has a self-oscillating fluid element 5 and a single flow jetting passage 6 arranged in parallel at the downstream stage of the circulating water inlet 7,
The self-oscillating fluidic element 5 has an output port 8 and the single flow jet channel 6 has an output port 9. In addition, the inflow port 7
A flow path switching means 10 is provided within the self-oscillating fluid element 5 and the single jetting passage 6, and this passage switching means 10 is assembled into the bathtub jetting device 4 by removing the lid 11.

Self-oscillating fluid element 5 in bathtub ejection device 4
and the single flow jetting passage 6 are arranged vertically in parallel, and the passage switching means 10 includes a valve body 12 for opening and closing the passage, a drive rod 14 having the same rotating shaft 13 as the valve body 12, and the drive rod. 14 and a shape memory alloy 15 which is a temperature-sensitive valve that serves as a driving source (the fifth
(see figure).

As is well known, shape memory alloys have the property of being deformed at a certain temperature due to crystal transformation due to temperature, as shown in FIG. 7, and this deformation causes the drive rod 14 to move.

The self-oscillating fluid element 5 includes a supply port 17, a supply nozzle 18, left and right adhesion side walls 19, 20, and the adhesion side wall 1.
9, 20, and feedback channels 25, 26 provided at the downstream end of the supply nozzle 18, into which openings 21, 22 of side walls 19, 20 and fluid capacitors 23, 24 are inserted. , and communicating control ports 27 and 28 (see FIG. 6).

In the above configuration, the circulation pump 3 is operated.
The bath water flows into the circulation path through the inlet 4', is heated by the heating device 1, and is ejected into the bathtub 2 from the bathtub ejection device 4.

In the circulation of the bath, when the circulating bath temperature is low, the shape memory alloy 15 which is the temperature sensing element in the flow path switching means 10 consisting of the temperature sensing valve 16 stretches, the drive rod 14 is pushed upward, and the valve body 12 rotate clockwise at the same time to open the single flow jet channel 6. As a result, the circulating bath is ejected from the output port 9 of the single flow ejection channel 6 into the bathtub 2 in a fixed direction with a constant flow velocity distribution.

Next, when the circulating bath temperature becomes high, the shape memory alloy 15 contracts, the drive rod 14 is pushed downward, and the valve body 12 rotates counterclockwise. The temperature-sensitive valve 16 opens a flow path on the self-oscillating fluid element 5 side. The circulating bath flowing into the self-oscillating fluid element 5 is connected to the supply port 1.
7 and becomes a high-speed jet at the supply nozzle 18.
The high-speed jet adheres to either the left or right side wall. Assume that it adheres to the side wall 19. The high-velocity jet adhering to the side wall 19 exits along the wall through the output port 8, while a portion of the flow along the wall flows into the opening 21 and enters the feedback channel 25. Further, it enters the fluid capacity 23, causing a time delay, reaches the control port 27, and flows out from the control port 27 as a control flow toward a high-speed jet. Therefore, the control flow flows from the control port 27 into the low-pressure adhesion region formed between the high-speed jet and the side wall 19, destroying the adhesion, and furthermore, due to the action of the control flow, the high-speed jet flows to the other side wall 20 side. and finally adheres to the side wall 20. Thereafter, according to the same principle, the jets adhere to the side walls 19 and 20 alternately,
It becomes a self-oscillating jet and is ejected from the output port 8 into the bathtub 2.

As explained above, when the circulating bath is low temperature, the flow is ejected into the bathtub 2 with a constant flow velocity distribution and in a fixed direction, and when the temperature is high, the flow is ejected as an oscillating flow that changes direction alternately left and right.

In the above embodiment, the flow path switching means used a temperature-sensitive valve that detects the circulating water temperature and automatically switches the temperature.
Even if a manual switching valve is used as the flow path switching means, the same operation can be achieved, and an oscillating flow and a single jet flow can be obtained.

As is clear from the above description, in the forced circulation bath heating device according to the present invention, hot flashes, excessive fatigue, etc. may occur when the body is exposed to a constant jet stream emitted from the bathtub jet device for a long time. The discomfort caused by this can be eliminated by converting it into an oscillating jet. Furthermore, when the circulating water temperature rises and a high-temperature jet hits the body, the oscillating jet can be used to reduce the heat applied to the body.

[Brief explanation of the drawing]

Fig. 1 is a system diagram of a forced circulation bath heating device showing an embodiment of the present invention, Fig. 2 is an external view of a bathtub ejection device of the same device, and Figs. 3 and 4 are bathtub ejection devices. 5 is a cross-sectional view taken along line A-A' in FIG. 3, FIG. 6 is a cross-sectional view taken along line B-B' in FIG. 5, and FIG. 7 is a characteristic diagram of the shape memory alloy. 4... Ejection device for bathtub, 5... Self-oscillating fluid element, 6... Single flow ejection path, 10... Flow path switching means, 12... Valve body, 15... Shape memory alloy, 16
...Temperature-sensitive valve.

Claims (1)

[Claims] 1. A self-oscillating fluid element and a single fluid ejection path are arranged side by side, and a flow path switching means is provided at an upstream position between the element and the ejection path to make the ejection flow pattern variable. A blowout device for bathtubs. 2. The jetting device for a bathtub according to claim 1, wherein the flow path switching means is a temperature-sensitive valve that detects the temperature of the circulating water and automatically switches the temperature. 3. The ejection device for a bathtub according to claim 2, wherein the temperature-sensitive valve comprises a temperature-sensitive body that is displaced depending on the temperature, and a valve body that is driven by the displacement of the temperature-sensitive body.